./test/VC/AttributeDefaultLegal:4: validity error: Attribute doc on At: invalid default value
<!ATTLIST doc At NMTOKEN "$$$">
                              ^
./test/VC/AttributeDefaultLegal:6: validity error: Attribute doc on bad: invalid default value
<!ATTLIST doc bad IDREF "1abc_2">
                                ^
./test/VC/AttributeDefaultLegal:8: validity error: Attribute doc on bad2: invalid default value
<!ATTLIST doc bad2 IDREFS "abc:1 1abc_2">
                                        ^
./test/VC/AttributeDefaultLegal:11: validity error: No declaration for attribute val on element doc
<doc val="v1"/>
             ^